听下面一段对话,回答第1~3小题。
A. He watched TV. B. He washed clothes. C. He cleaned the car.
A. Yes, he does. B. No, he doesn't. C. We don't know.
A. Yes, he does. B. No, he doesn't. C. We don't know.
听下面一段对话,回答第4~5小题。
A. It can be seven in the morning. B. It can be eleven in the morning.
C. It can be six in the evening.
A. He should finish his homework. B. He should help his parents do housework.
C. He should watch TV.
同类型试题
y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2